An experimental analysis of the hydrodynamic contribution of textured thrust bearings during steady-state operation: A comparison with the untextured parallel surface configuration

Abstract

Textured surfaces are the subject of a great deal of research work in tribology, which mainly involves numerical studies of lubricated contacts. A variety of shapes and arrangements of textures can be found, these being as numerous as the different authors. Depending on the configuration, it has been shown that the presence of the texture can provide better lubrication efficiency through both a reduction of friction and an increase in load-carrying capacity. However, improving bearing performance implies a specific geometrical configuration for given operating conditions. The improvement in lubricated contact performance by texturing the active surface has been demonstrated using experimental studies concerning, for example, pin-on-disk, mechanical seal, camshaft, journal bearing, thrust bearing, and piston ring set-ups. The objective of the present experimental analysis is to provide, using local measurements, a better understanding of the influence of surface texturing on the steady-state behavior of thrust bearings. To achieve this goal, the experimental device is equipped with 80 sensors such as thermocouples and pressure transducers which allowed a proper assessment of the phenomenology at the film/pad interface. The tests are conducted on five hydrodynamic thrust bearings, among which four are textured. Results show that, for the studied configurations, the textured thrust bearings can help to reduce friction up to 30% at low loads while for heavy loads, their performance is equivalent or even lower than that of an untextured planar bearing.

Keywords

Thrust bearing hydrodynamic lubrication friction texture experimental

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References

Etsion

Halperin

Brizmer

. Experimental investigation of laser surface textured parallel thrust bearings. Tribol Lett 2004; 17(2): 295–300.

Pascovici

Cicone

Fillon

. Analytical investigation of a partially textured parallel slider. J Eng Tribol 2009; 223: 151–158.

Papadopoulos C, Efstathiou E, Nikolakopoulos P, et al. Geometry optimization of textured 3-D micro-thrust bearings. Turbo Expo, No. GT2011-45822, 2011.

Dobrica

Fillon

Pascovici

. Optimizing surface texture for hydrodynamic lubricated contacts using a mass-conserving numerical approach. Proc IMechE, Part J: J Engineering Tribology 2010; 224: 737–750.

Rightmire G, Bill R and Anderson H. On the flow perperturbations and friction reduction introduced by surface dimples. In: Proceedings of the 14th Leeds–Lyon symposium on tribology, Lyon, France, 1987, vol. 12, pp.139–143.

Wang

Kato

Adachi

. Running-in effect on the load-carrying capacity of a water-lubricated SiC thrust bearing. J Eng Tribol 2004; 219: 117–124.

Marian

Kilian

Scholz

. Theoritical and experimental analysis of a partially textured thrust bearing with square dimples. Proc IMechE, Part J: J Enginneering Tribology 2007; 221: 771–778.

Glavatskih

McCarthy

Sherrington

. Hydrodynamic performance of a thrust bearing with micropatterned. Tribol Trans 2005; 148: 492–498.

Morris N, Rhamani R and Rahnejat H. Tribology of partial pad journal bearings with textured surfaces. In: Proceedings of the 3rd European conference on tribology (ECOTRIB), Vienna, Austria, 7–9 June 2011, 6pp.

10.

Henry Y, Bouyer J and Fillon M. An experimental hydrodynamic thrust bearing device and its application to the study of a tapered-land thrust bearing. ASME J Tribol 2014; 136: 1--10.

11.

Olver

Fowell

Spikes

. “Inlet suction”, a load support mechanism in non-convergent, pocketed, hydrodynamic bearings. Proc IMechE, Part J: J Engineering Tribology 2006; 220: 105–108.

12.

Neal P. Film lubrication of plane-faced thrust pads. In: Proceedings of the Institution of Mechanical Engineering: Lubrication and wear convention, no. 6, 1963, pp.52–59.